Lots to consider, and it really depends on where the panels are mounted and what kind of sun they get.
For panels in series, you will get better efficiency and they will work
better in low light. The tradeoff is that if one panel is shaded (or even just part of a panel) the output of all panels in the series is pulled down. Shading half a panel could kill almost all the output of every panel of the array. So it's best to only use Series if all of the panels will get sunlight without shading.
Parallel Panels can tolerate a single
panel being shaded, but are less efficient, require more light to start working, and produce higher currents and require heavier wire.
"Best" is a separate controller for each panel, but who wants 11 controllers on their boat
? So, we compromise. On my boat, I have 2 100W panels on each side. Because the panels on one side will be subject to the same lighting
, they are in series. Then the 2 sides are paralleled together. I then have 3 more panels that are in more random places that are paralleled together on a second controller.
As you are planning, consider balance. The wattage and voltage of any panels in parallel needs to be the same, or as close as you can get it. You don't want to parallel a 40V 200W panel with a 20V 100W panel. You most certainly don't want to parallel a few 100W panels with 6 100W panels that are in series. But you could to 5 in series paralleled with 5 more in series, provided the voltage of the panels were all the same.